Valve for jolt ramming-machines.



W. C. NORCROSS.

. VALVE FOR JOLT-RAMMING MACHINES.

APPLICATION FILED OCT 21, 1916.

1,245,954. Patented Nov. 6, 1917.

ran STATES Parana canton.

WILLIAM C. NORCROSS, OF 'IEBIRE HAU'TE, INDIANA.

VALVE FOB JOLT RAMMING -MACHINES.

Application filed October 21', 1916. Serial No. 126,846.

' 1,031,084, July 2, 1912; 1,194,059, August 8, 1916; 1224407, May 1, 1917; and 1231187, June 26, 1917; 7 v V I have found, in the actual use of my joltramming machines, that with the use of a coil spring capable of flexing, as in my Patents 1,031,084 and 1,194,059, the bending of the spring to a considerable incline tends to bring about premature displacement of the valve. When cone centers are used, as shown in my Patents Nos. 1224407 and 1231187, there is a tendency to displace the valve upwardly before the shoulder on the lower end of the piston strikes the movable stool when the piston is down, such action being due to the extra compression put upon the spring in that position on account of the considerable incline assumed bythe spring. The present invention has for its object the provision of an improved spring device or means cotiperating with the valve and with the solid lower end of the piston in a novel manner whereby accidental or premature displacement of the valve is prevented and the valve remains where kicked, until kicked back to its other position by the opposite reciprocation of the piston.

Certain embodiments of the invention are set forth hereinafter and shown in the accompanying drawings but as other modifications may be resorted to without departing from the essential principles of the invention, as illustrative, rather than restrictive, of the scope of the invention.

In the accompanying drawings: I v Figure 1, is an enlarged detail view of the invention, principally in section, with so much of the related parts of a jolt-ramming machine as will render its application there to clear; and

Fig. 2 a similar view of a modification. Only so much of the jolt-ramming machine is shown and described as will afford Specification of Letters Patent.

the disclosure is to be considered Patented Nov. 6, "191 a clear understanding of the construction,

application, and operationof the present improvements, reference being had to the aforesald patents. and applications for .a

further disclosure offeatures which form no 1 part of the present invention.

, In the drawings ,2 represents a portion of.

the cylinder; 27 the lower or. solid end of the'piston; 41 the projecting portion ,there-,

of and 38 the movable stoolwh-ich cotiperates with the part 41. The'air intake port appears at 24. andt-he exhaust at 25. The

shoulder 42 on the piston head 27 is adapt: 8

ed to coiiperate with the-valve.

The valve appears at 30 and is provided witha port or ports 31 to cotiperate with the ports 24, 25 1 y p The improved spring deviceor means is located within the socket or chamber 28- in the piston head 27, and comprises a tube or. shell 50 having a head 51 provided with a rocker, or arc-shaped, outer face 52 which has one or more rounded dowels53 loosely, received in concavities 54 in'the face of the valve 30. The head 51 is received in a recess or concavity 55 in the faceof the valve. The remaining parts of the improved spring device or means comprise a' stem or shank 56 which telescopes and fits within the tubular part 50 and has a cone head 57 whose apex bears against the apex 58 of the concavity at the end of the socket 28. Surrounding the tubular part 50 and exerting a constant expansion or pressure against the heads 51 and 57, is an expansion coil spring 59. v

The rocker or arc-shaped face 52 is struck from the apex 58 as a center so thatthe tension of the spring 59 remains substantially constant regardless of the position of the valve 30. There canbe no relative slipping, creeping, or displacement of the valve 30 by reason of the fact that the rocker face 52, lying in an arc of a circle whose center is the point 58, is provided and, furthermore, because the dowels or teeth 53 act as gear teeth in connection with the sockets or concavities 54. The action, as between the head 51 and the valve '30, is that of a rocker. I am thereby enabled to overcome the liability of premature shifting or dis placement of the valve which mayat times occur in connection with the valves of my earlier patents and applications.

As shown in the modification, in Fig. 2, the cone 57 may be dispensed with and a.

rocker 60, similar to the rocker 51, substituted therefor; The end of the socket 28 is flat, as at 61 and 1 provide dowels or teeth 62 and sockets 63, respectively corresponding to dowels 53 and sockets 54. When the double-ended rocker construction of Fig. 2 is employed, the faces 52'and 510i the respective rockers lie in arcs of a circle whose center lies and is disposed midway said faces as at the point 64.

I am aware that modifications can be resorted to other than those set forth. In any form the invention may assume, there is a direct bearing against the valve, whereas in my former constructions the flexing of the spring prevented such direct bearing at certain times, resulting in a tendency to pre mature displacement of the valve.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is: V

1. The combination with a shiftable valve, ofa rocker cooperating therewith, an abutment, a bearing member cooperating with the abutment, the abutment and bearing member having means to center the bearing member so it will not slip, and an inherently resilient spring interposed between the rocker and the bearing member adapted masses to maintain the rocker in its cooperative relationship to the valve.

2. The combination with a shiitable valve,-

of a rocker cooperating therewith, a bearing member, and an inherently resilient spring interposed between the bearing member andtherocke'r adapted to maintain the rocker in its cooperative relationship to the valve.

3. The'combination with a shiftable valve, of an abutment, a rocker bearing on the valve,a bearing member engaged with the abutment, slidably related stems on the rocker and bearing member, and a spring which is interposed between the rocker and bearing member.

4;. The combination with a shiftabie valve, of an abutment, a rocker cooperating with the valve, a bearing member engaged with the abutment, telescopic stems on the rocker and bearing member, and a coil spring surrounding the said stems adapted to maintain the rocker in engagement with the valve and the bearing member engaged with the abutment. 1

in testimony whereof, I hereunto affix my signature.

WILLIAM C. NORGROSS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

